Testing Limits, 220 Miles Above Earth - New York Times

Testing Limits, 220 Miles Above Earth - New York Times: "During her six-month stay on the International Space Station in 2002, Peggy Whitson, a NASA astronaut and biochemist, lived in a constant state of free fall. The station’s fast orbit of Earth — at 17,500 miles per hour — put everything and everyone into a weightless state, making life interesting, to say the least."